"Colorless" refers to the absence of color, meaning that an object or substance does not exhibit any hue. This term is often used to describe clear liquids, such as water, which can appear transparent and without color. In the context of light, colorless materials do not absorb or reflect specific wavelengths, making them appear invisible or neutral. In chemistry, a colorless substance can indicate purity or a lack of impurities that might impart color. For example, gases like oxygen and carbon dioxide are typically colorless, allowing them to blend seamlessly into the atmosphere without being visually detected.